Jackknife window



W. A. BOWMAN JACKKNIFE WINDOW May 5, 1953 5 sheets-sheet 1 Filed May 7, 1949 lllllllll 1 i I I .lll

INVENTOR. WILLIAM A. BowMAN FIG. 4.

ATTORNEY May 5, 1953 w. A. BOWMAN JACKKNIFE WINDOW Filed May 7, 1949 5 Sheets-Sl'xee'fI 2 JNVENToR. WILLIAM A. BOWMAN ATTORNEY.

May 5, 1953 W. A. BOWMAN 2,637,381

JACKKNIFE WINDOW INVENTOR. WILLIAM A. BOWMAN.

ATTORNEK Patented May 5, 1953 UNHTED STATES PATENT OFFICE LACKKNIFE 'William A. Bowman, Baltimore, Md. Application May 7, 1949, SeriaLNo. 92,019

4 Claims. 1

This invention relates to window construction and more particularly to double glazed sash fitted in window frames oi the jacii-laniie "variety which operates along the lines indicated 'in the copending applications of the applicant, and dentiied by the Serial Number 672363, vfiled May met now Fat-ent Number 2,513,278, issued July 4, 1950, and Serial Number 81,375; tiled March 11i, i949, now abandoned, to which reierence is made.

The constructions shown in the previous applications included an adjustable frame that folds into various angular positions outside the normal 'plane of the Vwindow easement opening and are hinged together to enable Vthis to be done. The sashes positioned in said 'frames are double glazed but lacked means vfor cleaningthe outer pane from the inside of the building to they are attached, and lac-i; means for weather stripping.

One of 'the objects of this invention is to provide a newand .improved window structure that will avoid one or more of the disadvantages vand limitations of the prior art.

Another object 'of the present invention is to provide a new and improved window `structure that will provide 'a plurality 'of slide joints vbetween the frame and 'easement sections to make them'weather tight during their movements to various angular positions.

Another object oi" the present invention is to provide an improved double glazedstructure having its outer window pane pivotally connected to the sash to enable it to Vbe rotated therein and having its inner 'Window pane removably connected in said sash.

Another object of the present invention is to provide a new and improved window 'structure that will facilitate access to all parts oi" the window pane without dismantling the outside frames in which they are mounted 'and operated.

still further object oi the present vinvention is to provide a jack-knife frame having a plurality of double glazed sashes mounted to eniable the inner lites'to he removed and 'the outer panes to be rotated to permit access -to 'the faces for cleaning and other purposes.

Other objects of the invention will be ohserved as its `structure and principles are outlined.

For a better understanding of the invention and the objects "thereof, reference is made to the appended drawings, which illustrate a particular form by way of example, while the claims indicate the scope of the invention.

The conventional types of Window frames and sashes have the disadvantage of xity that prevents access rto the outside ina convenient manner. This is due 'to the fact that these sashes moveup in runways that keep them from movements outside of the planes in which they normally reciprocate. 'This invention provides a window frame structure that allows the window panes to be taken out ci" the main window structure or revolved therein to present the face of the Window pane either `towards, the `iront or back of the structure and be rendered accessible to an individual inthe building for cleaning and other purposes.

In 'the drawings:

Figure 1 is anouter view of the combinedstorm window embodying this invention;

Figure 2 is a sectional View taken along line 2 2 of Figure 1;

Figure 3 is a side elevation of the window in raised jack-knife position with parts broken away to show its inner construction;

vFigure 4 is a view of Figure 3,v looking from vthe outside of 'the building;

Figure 5 is a sectional elevation, similar to that shown in Figure 2., 'except that thenner sections have been removed andthe outer sections tilted inwardly for cleaning;

Figure 6 'is an elevational view taken of the inner window showing the inner sashes locked in position;

Figure 7 is an enlarged View showing the cam clips locked in the slots to hold the inner sash in place;

YFigure 8 is an enlarged view of the hinge arrangement showing the method used for joining the sashes;

Figure 9 is a sectional view 'taken along line 9 9 of Figure 6;

Figure 10 is a sectional View taken through the outer sashpivoting means to show its construction;

Figure 11 is a sectional view taken through the lower sash, bottom member and side rails and shows the window in locked position but vwith the revolving window stripping in open position;

`Figure 12 is a sectional view taken along line l2-.l.2 of Fig. 1'1;

Figure '13 is a sectional view Itaken along and through the lower sash similar to that shown in Figure 11 except that the window is in locked position against raising, but the weather strips are closed; and

Figure "14 is a sectional view taken along line lite-lli of Fig. 13.

Similarparts are designated by the same reference numerals throughout the drawings.

The main or outside easement structure oi a window is shown at I and is composed of a top member II having a concaved surface I4 therein, a bottom member I2, two side members I3 provided with channels I5 to be referred to in detail later. A frame I6 is positioned in the easement structure II) and supported and pivoted on pins I 'I that enable the frame to be swung up and down. The frame I6 is composed of an upper sash I8 and a lower sash I9 pivoted at 20 to enable the frame and sashes to swing outwardly in a jack-knife manner.

The upper sash I8 is formed with an upper rail 2| having an arcuate form at 22 that fits into the concaved surface I4 of top member II. The

lower rail 23 is provided with a reverse curve of semi-convexed and concaved surface 24 preferably of the same radius used for concave surface I4 in top member II.

Side rails are preferably of a T shape and are used to connect the upper member Il, and lower member 23, as shown in Figures i and 2. The lower sash I9 is very much the same shape and size as the top sash previously mentioned. It has an upper rail i2l having an arcuate form at |22 that ts into the conca-ved surface 24 of the lower member 23 of the upper sash. The side members f2.5 are preferablyr T-shaped and are usually the same as side members 25 above mentioned and used to connect the upper rail iii to the lower member 28. The lower member 22 is formed as shown in the drawings. The upper and lower sashes are pivotally connected by hinge parts S9 and 3i and are attached to the sashes by screws 32 and connected by pivot pins 33.

Lugs 25 are projected laterally from the lower sash I9 to ride in the channels i5 provided in the vertical wall members I3 of the easement i5. As the lower sash I9 is raised the lugs 2@ slide in the channels i5 and guide the lower member 28 so it cannot move out of alignment with the channel but will slide in same to allow the rest of the frame and sashes to jack-knife outwardly. The upper sash i9 hinges at Il to the easement it and to the lower sash at 29 as already noted. The hinge Il pivots and supports the sash i8 held at the top of the Casement Iii, but allows the upper sash I8 to jack-knife outwardly as shown.

The sashes I8 and i9 are of the storm window type and of a diierent construction from that of the ordinary sashes, in that they both have an inner removable panel 2l' holding a window pane 29 preferably of glass, and a pivoted outer panel 39.

The panel 2l frames the glass in it in a single removable unit, and has cam clips 33 fastened to the inner panel 2l by pins 32 and its movement is regulated by an arcuate slot 34 in which a stop 35 is positioned and is moved hy a handle so the end 31 will engage in the slots 3i in the frame i5 to permit the placement and removal of the inner removable panels 2l. The panels 21 are held at the top of sashes i9 and i9 by stops 52. When the panels 2i are removed they may be cleaned at the leisure and convenience of the user. The sashes are double paned as in storm windows, with the outer panel 33 in each ease held by and swung on pins 39 which project into holes 4I in the side ledges 42 of the side rails 25 and |25 of the upper and lower sashes I8 and I 9 respectively. The sash 38 can only be swung on its pivot when the inner sash 2l' has been removed. The ledges on the upper and lower sashes I8 and I9 are of angular form 43 to prevent Weather entering the sash when the angular face 44 of outer panel 38 is pressed tightly against the face 43. Suitable weather stripping 40 is installed at suitable locations between the inner and outer panels to prevent undue leakage between the frame and the sashes. Glazing gaskets 45 are positioned in the outer panel 38 and glazing gaskets 46 are positioned in the inner panels to support the glass 29 in their respective panels.

The frame I6 and sides I3 are provided with concaved faces 53 in which half-round Weather strips 54 preferably rotate to prevent leakage between the faces of the frame and outside casement. The strip 54 is provided with pins 55 that t in holes in the top and bottom members II) and I2 respectively. A lever 51 is attached at one end to the lower pin 55 and with the other end bent downwardly and tted into the slotted fork end 'I5 of a lever 58 aixed to plate 59. The plate 59 is pivoted at 'I5 and swings thereon in a slot 55 when pushed backwards by the lugs 26 to rotate the Weather strip 54 into closed position. Holes 55 are positioned at the rear of the channel I5 to allow the lugs 26 to pass therethrough and Contact the plates 59. When the lugs are withdrawn from the holes 65, the plate 59 returns toits normal position against the rear wall of the channel I5 under tension of springs 6U. The lugs 25 are mounted in holes 6I in the lower member 23 of sash i9 and are moved by a knob 62 connected to a fulcrum 63 through connectors 64. A screw 65 limits the movement of the fulcrum 53 to prevent the lugs 26 from being withdrawn from holes 5I when it is desired to withdraw the lugs 23 from the channel I5 and remove the frame I6 from the easement I0. The sashes I8 and I9 are held in open position through contact of the lugs with the rear Wall of the channel I5 in the sides I3.

A suitable arrangement of ilexible screening 4'! is installed in conjunction with the window sashes to prevent the ingress of nies or other insects. The screening winds up on a spring actuated roller (not shown) in casings 48 mounted on the inside easement, and being attached to the lower sash I9 it opens and closes with same, as the latter is raised or lowered. The connection or anchor 49 enables the inner screen to be attached or detached as desired or required. A similar screen 4l is mounted in bottom member l2 and attached to lower member 28.

The access to the panes of glass that the panels aord by their construction is very convenient and removes the dangers that repairmen and window washers incur in the repair and maintenance of the present forms of windows that necessitate that the window washer be suspended from the outside of the building keeping them clean.

It should be particularly noted that this type of window avoids the use of balance weights and can be raised or lowered mechanically or manually locked in the predetermined positions as shown in applications mentioned above. When the window is lowered, the knob 62 is turned and moves the lugs 26 into holes 65 and prevents the sash from being raised from the outside. When it is desired to engage the half round weatherstrips 54, the knob 62 is rotated until the lugs 26 pass through holes 6I and 65 and pushes plates 59 and moves the strips 54 into closed position. When it is desired to withdraw the lugs 26 from engagement with channels I5,

the screw 66 is removed and the movement of 5 nob 62 reversed until the fulcrum contacts stop While but one general form of the invention is shown in the drawings and described in the specifications, it is not desired to limit this application for patent to this particular form, as it is appreciated that other forms of construction could be made that would use the same principles and come within the scope of the appended claims.

Having thus described the invention, what is claimed is:

1. In combination, a window easement comprising side walls, a bottom member, a top member having an inner concave surface, a frame composed of an upper and lower sash, the upper sash including an upper rail of outwardly arcuate form being received in and cooperating with the concave surface of the top member to allow rotation of the upper sash in the top member, the upper sash including a lower rail having an inner concave surface and an adjacent convex surface and the lower sash including an upper rail of outwardly arcuate form being received in the concave surfaceof the upper sash rail when the sashes are in closed position and cooperating with the convex surface of the upper rail to allow rotation between the sashes to open the latter, frames carried by the sashes for mounting glass panes therein, pivot means between the sashes and guide means for the lower sash cooperating with the aforesaid side walls, whereby said sashes protrude outwardly of the easement while rotating about the pivot means when the lower sash is moved upwardly alo-ng the guide means,

6 whereby the screen moves with the lower sash, a second screen cooperating with the lower sash, and means for securing one end of the last mentioned screen to the lower member and the opposite end to the lower sash, whereby the second screen moves with the lower sash.

3. The combination set forth in claim 1, including weather stripping between s-aid easement and frame, and manual means for moving said weather stripping out of engagement with said easement and frame.

4. In combination, a window easement, a frame in said easement composed of an upper and a lower sash, means for pivoting the upper edge f of the upper sash to the easement, means for pivoting the lower edge of the upper sash to the upper edge of the lower sash, means for guiding the lower` edge of the lower sash in the easement whereby both sashes wil move outwardly :and angularly when the lower sash is pushed upwardly, a removable glass-carrying panel in each sash, a. second glass-carrying panel in each sash and means for pivoting said last mentioned panel medially of its length to the cooperating sash, whereby the said last mentioned panels may be swung about its pivot when the adjoining panel in the same sash is removed.

WILLIAM A. BOWMAN.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 323,408 Fennerty Aug. 4, 1885 465,755 Deacon Dec. 22, 1891 507,151 Moore Oct. 24, 1893 '778,387 Wadsworth Dec. 27, 1904 1,757,048 Janeczko May 6, 1930 2,296,985 Cresswell Sept. 29, 1942 2,349,543 Escher May 23, 1944 2,513,278 Bowman July 4, 1950 FOREIGN PATENTS Number Country Date 223,345 Canada Sept. 5, 1922 

